Datasheet TDA3609JR Datasheet (Philips)

INTEGRATED CIRCUITS

DATA SH EET

TDA3609JR

Multiple voltage regulator with
switch and ignition buffers

Preliminary specification
File under Integrated Circuits, IC01

1997 Aug 15

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

FEATURES
General

• Extreme low noise behaviour and good stability with
very small output capacitors

• Two V
regulator 3) and a power switch

• Regulator 2, reset and ignition buffer operate during
load dump and thermal shutdown

• Separate control pins for switching regulator 1,
regulator 3 and the power switch

• Supply voltage range of −18 to +50 V

• Low reverse current of regulator 2

• Low quiescent current (when regulator 1, regulator 3,

and power switch are switched-off)

• Hold output (only valid when regulator 1 is switched-on)

• Reset and hold outputs (open collector outputs)

• Adjustable reset delay time

• High ripple rejection

• Back-up capacitor for regulator 2

• Two independent ignition buffers (one inverted and with

open collector output).

Protections

• Reverse polarity safe (down to −18 V without high
reverse current)

• Able to withstand voltages up to 18 V at the outputs
(supply line may be short-circuited)

• ESD protected on all pins

• Thermal protections with hysteresis

• Load dump protection

• Foldback current limit protection for

regulators 1, 2 and 3

• Delayed second current limit protection for the power
switch (at short-circuit)

• The regulator outputs and the power switch are DC
short-circuited safe to ground and V

-state controlled regulators (regulator 1 and

P

.

P

GENERAL DESCRIPTION

The TDA3609JR is a multiple output voltage regulator with
a power switch and ignition buffers, intended for use in car
radios with or without a microcontroller. It contains:

• Two fixed voltage regulators with a foldback current

• A power switch with protections, operated by an enable

• Reset and hold outputs that can be used to interface by

• A supply pin which can withstand load dump pulses and

• Regulator 2 that will be switched on at a back-up voltage

• A provision for use of a reserve supply capacitor that will

• An inverted ignition 1 input with open collector output

• An ignition 2 input Schmitt trigger with push pull output

TDA3609JR

protection (regulator 1 and regulator 3) and one fixed
voltage regulator (regulator 2), intended to supply a
microcontroller, that also operates during load dump
and thermal shutdown

input

the microcontroller. The reset-signal can be used to call
up the microcontroller and the hold output indicates
regulator 1 voltage available and within range.

negative supply voltages.

greater than 6.5 V and off when the output voltage of
regulator 2 drops below 1.9 V.

hold enough energy for regulator 2 (5 V continuous) to
allow a microcontroller to prepare for loss of voltage.

stage.

stage.

ORDERING INFORMATION

PACKAGE

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA3609JR DBS17P plastic DIL-bent-SIL (special bent) power package; 17 leads

(lead length 12 mm)

1997 Aug 15 2

SOT475-1

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

q(tot)

T

j

Voltage regulators

V

O(REG1)

V

O(REG2)

V

O(REG3

Power switch

V

d

I

M

supply voltage

operating 11 14.4 18 V
reverse polarity non-operating −−−18 V
regulator 2 on 2.4 14.4 50 V
jump start t ≤ 10 minutes −−30 V
load dump protection t ≤ 50 ms; t

≥ 2.5 ms −−50 V

r

total quiescent supply current standby mode − 500 600 µA
junction temperature −−150 °C

output voltage regulator 1 1 mA ≤ I
output voltage regulator 2 0.5 mA ≤ I

) output voltage regulator 3 1 mA ≤ I

≤ 600 mA 9.5 10.0 10.5 V

REG1

≤ 150 mA; VP= 14.4 V 4.75 5.0 5.25 V

REG2

≤ 500 mA 4.75 5.0 5.25 V

REG3

drop-out voltage Isw=1A − 0.45 0.7 V

I

= 1.8 A − 1 1.8 V

sw

peak current 3 −−A

1997 Aug 15 3

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

BLOCK DIAGRAM

handbook, full pagewidth

V

ENSW

(14.4 V)

P

1

11

Vup = 7, V

= 4.5

fall

BACK-UP CONTROL

POWER SWITCH

&

BACK-UP SWITCH

TEMPERATURE

LOAD DUMP

PROTECTION

(14.2 V/3 A)

17

16

(14.2 V/100 mA)

TDA3609JR

SW

BU

C

RES

IGN2

IGN1

EN3

EN1

IN

IN

15

REGULATOR 2

4

&

&

10

REGULATOR 3

REGULATOR 1

TDA3609JR

13

5

6

IGNITION BUFFER

INVERTER

(5 V/100 mA)

(5 V/500 mA)

3

(10 V/600 mA)

2

12

9

8

7

REG2

REG3

REG1

HOLD

RES

IGN2

IGN1

OUT

OUT

14

Fig.1 Block diagram.

1997 Aug 15 4

GND

MGK607

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

PINNING

SYMBOL PIN DESCRIPTION

V

P

REG1 2 regulator 1 output
REG3 3 regulator 3 output
EN3 4 enable input regulator 3
IGN2

IN

IGN1

IN

IGN1

OUT

IGN2

OUT

RES 9 reset output
EN1 10 enable input regulator 1
ENSW 11 enable input power switch
HOLD 12 hold output
C

RES

GND 14 ground
REG2 15 regulator 2 output
BU 16 back-up
SW 17 power switch output

1 supply voltage

5 ignition 2 input
6 ignition 1 input
7 ignition 1 output (active LOW)
8 ignition 2 output

13 reset delay capacitor

handbook, halfpage

IGN2

IGN1
IGN1
IGN2

V

REG1
REG3

EN3

OUT
OUT

RES

EN1

ENSW

HOLD
C

RES

GND

REG2

BU

SW

P

IN
IN

10
11
12
13
14
15
16
17

1
2
3
4
5
6
7
8
9

TDA3609JR

TDA3609JR

MGK606

FUNCTIONAL DESCRIPTION

The TDA3609JR is a multiple output voltage regulator with
a power switch, intended for use in car radios with or
without a microcontroller. Because of low-voltage
operation of the car radio, low-voltage drop regulators are
used in the TDA3609JR.

Regulator 2 will switch on when the back-up voltage
exceeds 6.5 V for the first time and will switch off again
when the output voltage of regulator 2 is below 1.9 V (this
is far below an engine start). When regulator 2 is switched
on and the output voltage of this regulator is within its
voltage range, the reset output will be enabled (reset will
go HIGH via a pull-up resistor) to generate a reset to the
microcontroller. The reset cycles can be extended by a
external capacitor at pin 13. The above mentioned start-up
feature is built-in to secure a smooth start-up of the
microcontroller at first connection, without uncontrolled
switching of regulator 2 during the start-up sequence.

Fig.2 Pin configuration.

The charge of the back-up capacitor can be used to supply
regulator 2 for a short period when the supply falls down
to 0 V (time depends on value of storage capacitor).

The output stages (regulator 1 and 3) of this regulator have
extreme low noise behaviour and good stability. Using
small output capacitors regulator 1 and 3 are made stable.

When both regulator 2 and the supply voltage (V

> 4.5 V)

P

are available, regulators 1 and 3 can be operated by
means of enable inputs (pins 10 and 4 respectively).

Regulator 1 has a hold output (open collector) indicating
that the output voltage of this regulator is settled (held
HIGH by external pull-up resistor). When the output
voltage of this regulator drops out of regulation (because
of supply voltage drop or high load) the hold output will go
LOW. The hold output signal is only valid when regulator 1
is enabled by its enable input (pin 10).

1997 Aug 15 5

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

The power switch can also be controlled by means of a
separate enable input (pin 11).

All output pins are fully protected. The regulators are
protected against load dump (regulator 1 and 3 will switch
off at supply voltages >18 V) and short-circuit (foldback
current protection).

The switch contains a current protection, but this
protection is delayed at short-circuit condition for at least
10 ms. During this time the output current is limited to a
peak value of at least 3 A and 2 A continuous (VP≤ 18 V).

handbook, full pagewidth

V

7.0 V

P

4.5 V

TDA3609JR

At supply voltages >17 V the switch is clamped at
maximum 16 V (to avoid external connected circuitry being
damaged by an overvoltage) and the switch will switch off
at load dump.

By means of two independent ignition Schmitt triggers and
ignition output buffers (one open collector and one
push-pull output), interfacing with the microcontroller can
be accomplished (simple full/semi on/off logic
applications). The ignition 1 output is inverted.

The total timing diagrams are shown in Figs 3 and 4.

load dump

ignition 1

input

ignition 1

output

V

P

ignition 2

input

ignition 2

output

≤50 V

≥3.25 V

≤1.1 V

≥−100 V

5.0 V

Enable Schmitt trigger ignition 1

load dump

≤50 V

≥2.2 V
≤2.0 V

≥−100 V

5.0 V

MGK611

Enable Schmitt trigger ignition 2

Fig.3 Timing diagram ignition Schmitt triggers.

1997 Aug 15 6

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

handbook, full pagewidth

V

P

V

BU

regulator 2

reset
delay

capacitor

reset

V

P

enable

regulator 1

6.5 V

5.4 V

5.0 V

1.9 V
0 V

5.0 V

3.0 V
0 V

6.0 V

18 V

10.4 V

7.0 V

4.0 V

≥2.2 V
≤2.0 V

load dump

Back-up Schmitt trigger and reset behaviour

load dump

TDA3609JR

regulator 1

enable

regulator 3

regulator 3

V

P

enable

power
switch

power
switch
output

10 V

0 V

≥2.2 V
≤2.0 V

5.0 V

0 V

16.9 V

7.0 V

4.0 V

≥2.2 V
≤2.0 V

16 V

0 V

VP and enable Schmitt trigger

load dump

Power switch behaviour

Fig.4 Timing diagram regulators and power switch.

MGK610

1997 Aug 15 7

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

P

P

tot

T

stg

T

amb

T

j

THERMAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS VALUE UNIT

R

th(j-c)

R

th(j-a)

supply voltage

operating − 18 V
reverse polarity non-operating −−18 V
jump start t ≤ 10 minutes − 30 V

load dump protection t ≤ 50 ms; tr≥ 2.5 ms − 50 V
total power dissipation − 62 W
storage temperature non-operating −55 +150 °C
ambient temperature operating −40 +85 °C
junction temperature operating −40 +150 °C

thermal resistance from junction to case 2 K/W
thermal resistance from junction to ambient in free air 50 K/W

1997 Aug 15 8

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

CHARACTERISTICS

V

= 14.4 V; T

P

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

q

Schmitt trigger power supply for switch, regulator 1 and regulator 3

V

thr

V

thf

V

hys

Schmitt trigger for regulator 2

V

thr

V

thf

V

hys

Schmitt trigger for enable input (regulator 1, regulator 3 and switch)

V

thr

V

thf

V

hys

I

LI

Reset trigger level

V

thr

=25°C; see Fig.7; unless otherwise specified.

amb

supply voltage

operating 11 14.4 18 V
regulator 2 on note 1 2.4 14.4 18 V
jump start t ≤ 10 minutes −− 30 V
load dump protection t ≤ 50 ms; t

quiescent supply current VP= 12.4 V; note 2;

I

REG2

= 14.4 V; note 2;

V

P

I

REG2

≥ 2.5 ms −− 50 V

r

− 500 600 µA

= 0.1 mA

− 520 −µA

= 0.1 mA

rising threshold voltage 6.5 7.0 7.5 V
falling threshold voltage 4.0 4.5 5.0 V
hysteresis voltage 2.1 2.5 3.3 V

rising threshold voltage 6.0 6.5 7.1 V
falling threshold voltage 1.7 1.9 2.2 V
hysteresis voltage − 4.6 − V

rising threshold voltage 1.7 2.2 2.7 V
falling threshold voltage 1.5 2.0 2.5 V
hysteresis voltage I

REG=Isw

= 1 mA 0.1 0.2 0.5 V

input leakage current Ven=5V 1 5 10 µA

rising threshold voltage of
regulator 2

VPrising; I
note 3

REG1

=50mA;

4.5 V

REG2

− 0.15 V

REG2

− 0.1 V

Schmitt trigger for hold

V

thr

rising threshold voltage of

VPrising; note 3 − V

regulator 1

V

thf

falling threshold voltage of

VPfalling; note 3 9.2 V

regulator 1

V

hys

hysteresis voltage 0.1 0.2 0.3 V

Reset and hold buffer

I

sinkL

I

LO

LOW-level sink current V

RES/HOLD

output leakage current VP= 14.4 V;

V

RES/HOLD

≤ 0.8 V 2 −−mA

=5V
rise time note 4 − 750µs
fall time note 4 − 150µs

1997 Aug 15 9

− 0.15 V

REG1

− 0.35 − V

REG1

REG1

− 0.075 V

− 0.1 5 µA

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Reset delay

I

ch

I

dch

V

thr

t

d

Regulator 1 (I

V

O(off)

V

O(REG1)

∆V line regulation 12 V ≤ V
∆V

L

I

q

SVRR supply voltage ripple

V

d

I

REGm1

I

REGsc1

Regulator 2 (I

V

O(REG2)

∆V line regulation 6 V ≤ V

∆V

L

SVRR supply voltage ripple

V

d

I

REGm2

I

REGsc2

charge current 2 4 8 µA
discharge current 500 800 −µA
rising voltage threshold 2.5 3.0 3.5 V
delay time C = 47 nF; note 5 20 35 70 ms

= 5 mA unless otherwise specified)

REG1

output voltage off − 1 400 mV
output voltage 1 mA ≤ I

12 V ≤ V

load regulation 1 mA ≤ I

≤ 600 mA 9.5 10.0 10.5 V

REG1

≤ 18 V 9.5 10.0 10.5 V

P

≤ 18 V − 275mV

P

≤ 600 mA − 20 100 mV

REG1

quiescent current IR1= 600 mA − 25 60 mA

f

= 3 kHz; V

i

=2V 60 70 − dB

i(p-p)

rejection
drop-out voltage I

REG1

= 550 mA;

− 0.4 0.7 V

VP= 9.5 V; note 6

current limit V

> 8.5 V; note 7 0.65 1.2 − A

REG1

short-circuit current RL≤ 0.5 Ω; note 8 250 800 − mA

= 5 mA unless otherwise specified)

REG2

output voltage 0.5 mA ≤ I

I

= 300 mA; note 9 4.75 5.0 5.25 V

REG2

8V≤V

P

18 V ≤ V
I

≤ 150 mA

REG2

P

6V≤V

P

load regulation 1 mA ≤ I

1mA≤I
f = 3 kHz; V

≤ 150 mA 4.75 5.0 5.25 V

REG2

≤18 V 4.75 5.0 5.25 V

≤ 50 V;

P

4.75 5.0 5.25 V

≤ 18 V − 250mV
≤50 V − 15 75 mV

≤ 150 mA − 20 50 mV

REG2

≤ 300 mA −− 100 mV

REG2

= 2 V 60 70 − dB

i(p-p)

rejection
drop-out voltage I

REG2

= 100 mA;

− 0.4 0.6 V

VP= 4.75 V; note 6
I

REG2

= 200 mA;

− 0.8 1.2 V

VP= 5.75 V; note 6
I

REG2

= 100 mA;

− 0.2 0.5 V

Vbu= 4.75 V; note 10
I

REG2

= 200 mA;

− 0.8 1.0 V

Vbu= 5.75 V; note 10

current limit V

> 4.5 V; note 7 0.32 0.37 − A

REG2

short-circuit current RL≤ 0.5 Ω; note 8 20 100 − mA

1997 Aug 15 10

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Regulator 3 (I

V

O(off)

V

O(REG3)

output voltage off − 1 400 mV
output voltage 1 mA ≤ I

∆V line regulation 7 V ≤ V
∆V

L

I

q

load regulation 1 mA ≤ I
quiescent current IR3= 500 mA − 19 45 mA

SVRR supply voltage ripple

rejection

V

d

I

REGm3

I

REGsc3

drop-out voltage I

current limit V
short-circuit current RL≤ 0.5 Ω; note 8 100 400 − mA

Power switch

V

d

I

dc

V

cl

I

M

V

fb

I

sc

drop-out voltage Isw= 1 A; VP= 13.5 V;

continuous current VP= 16 V; Vsw= 13.5 V 1.8 2.0 − A
clamping voltage VP≥ 17 V 13.5 15.0 16.0 V
peak current VP= 17 V; notes 12 and 13 3 −−A
fly back voltage behaviour Isw= −100 mA − VP+ 3 22 V
short-circuit current VP= 14.4 V; Vsw< 1.2 V;

= 5 mA unless otherwise specified)

REG3

7V≤V

f

= 3 kHz; V

i

REG3

VP= 5.75 V; note 6

REG3

note 11
I

= 1.8 A; VP= 13.5 V;

sw

note 11

note 13

≤ 500 mA 4.75 5.0 5.25 V

REG3

≤18 V 4.75 5.0 5.25 V

P

≤ 18 V − 250mV

P

≤ 500 mA − 20 75 mV

REG3

=2V 60 70 − dB

i(p-p)

= 500 mA;

− 1 1.5 V

> 4.5 V; note 7 0.60 0.80 − A

− 0.6 0.85 V

− 1.4 1.9 V

− 0.8 − A

Back-up switch

I

dc

V

cl

I

r

continuous current 0.3 0.35 − A
clamping voltage VP≥ 16.7 V −− 16 V
reverse current VP=0V; Vbu= 12.4 V −− 900 mA

Schmitt trigger for enable input of ignition 1

V

thr

rising threshold voltage of
ignition 1 input

V

thf

falling threshold voltage of
ignition 1 input

V

hys

I

LI

I

I(clamp)

V

IH(clamp)

hysteresis voltage 1.5 −−V
input leakage current V
input clamping current V

=5V −− 1.0 µA

IGN1in

>50V −− 50 mA

IGN1in

HIGH-level input clamping
voltage

V

IL(clamp)

LOW-level input clamping
voltage

1997 Aug 15 11

2.75 3.25 3.75 V

0.8 − 1.3 V

V

− 50 V

P

−0.6 − 0V

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Schmitt trigger power supply for ignition 1

V

thr

V

thf

Ignition 1 buffer

V

OL

I

OL

I

LO

t

PLH

t

PHL

Schmitt trigger for enable input of ignition 2

V

thr

V

thf

V

hys

I

LI

I

I(clamp)

V

IH(clamp)

V

IL(clamp)

rising threshold voltage 6.5 7.0 7.5 V
falling threshold voltage note 14 4.0 4.5 5.0 V

LOW-level output voltage I
LOW-level output current V
output leakage current V
LOW-to-HIGH

propagation time
HIGH-to-LOW

propagation time

rising threshold voltage of

V

0.8 V to 3.75 V
V

3.75 V to 0.8 V

VP> 3.5 V 1.9 2.2 2.5 V

= 0 mA 0 0.2 0.8 V

IGN1out

≤ 0.8 V 0.45 0.8 − mA

IGN1out
IGN1out
IGN1in

IGN1in

=5V; V

rising from

falling from

=0V −− 1.0 µA

IGN1in

−− 500 µs

−− 500 µs

ignition 2 input
falling threshold voltage of

VP> 3.5 V 1.7 2.0 2.3 V

ignition 2 input
hysteresis voltage VP> 3.5 V 0.1 0.2 0.5 V
input leakage current V
input clamp current V
HIGH-level input clamping

=5V −− 1.0 µA

IGN2in

>50V −− 50 mA

IGN2in

V

− 50 V

P

voltage
LOW-level input clamping

−0.6 − 0V

voltage

1997 Aug 15 12

Philips Semiconductors Preliminary specification



Multiple voltage regulator with switch and

TDA3609JR

ignition buffers

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Ignition 2 buffer

V
V
I
I
I

OL

OH
OL
OH
LO

LOW-level output voltage I
HIGH-level output voltage I
LOW-level output current V
HIGH-level output current V
output leakage current

V

(source)

t

PLH

t

PHL

LOW-to-HIGH
propagation time

HIGH-to-LOW
propagation time

V

1.7 V to 2.5 V
V

2.5 V to 1.7 V

Notes

1. Minimum operating voltage, only if VP has exceeded 6.5 V.

2. The quiescent current is measured in the standby mode. So, the enable inputs of regulator 1, 3 and the power switch
are grounded and R

L(REG2)

= ∞ (see Fig.7).

3. The voltage of the regulator sinks as a result of a VP drop.

4. The rise and fall time is measured with a 10 kΩ pull-up resistor and a 50 pF load capacitor.

= 0 mA 0 0.2 0.8 V

IGN2out

= 0 mA 4.5 5.0 5.25 V

IGN2out

≤ 0.8 V 0.45 0.8 − mA

IGN2out

≥ 4.5 V −0.45 −2.0 − mA

IGN2out
IGN1out

IGN2in

IGN2in

=5V; V

rising from

falling from

=0V −− 1.0 µA

IGN1in

−− 500 µs

−− 500 µs

C

5. The delay time depends on the value of the capacitor:

t

d

6. The drop-out voltage of regulators 1, 2 and 3 is measured between V

7. At current limit, I

is held constant (see Fig.5 for behaviour of I

REGmn

V

× C 750 103×

------

C(th)

I

ch

REGmn

× ms()==

and REGn.

P

).



8. The foldback current protection limits the dissipated power at short-circuit (see Fig.5).

9. The peak current of 300 mA can only be applied for short periods (t < 100 ms).

10. The drop-out voltage measured between BU and REG2.

11. The drop-out voltage of the power switch is measured between VP and SW.

12. The maximum output current of the switch is limited to 1.8 A when the supply voltage exceeds 18 V.
A test-mode is built-in. The delay time of the switch will be disabled when a voltage of VP+ 1 V is applied to the
switch-enable input.

13. At short-circuit, Isc of the power switch is held constant to a lower value than the continuous current after a delay of
at least 10 ms. A test-mode is built-in. The delay time of the switch will be disabled when a voltage of VP+1V is
applied to the switch-enable input.

14. V

IGN1out

= LOW for V

IGN1out

> 1.2 V or V

> 1.3 V or V

EN1

> 1.3 V or V

EN3

ENSW

> 1.3 V.

1997 Aug 15 13

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

handbook, halfpage

10 V

V

O(REG1)

2 V

I

REGsc1

≥300 mA

a. Regulator 1. b. Regulator 2.

handbook, halfpage

V

O(REG3)

5.0 V

I

REG1

MGK608

I

REGm1

handbook, halfpage

V

O(REG2)

5.0 V

1 V

I

REGsc2

≥50 mA

MGK656

TDA3609JR

MGK655

I

I

REG2

REGm2

VSW>5V.

1 V

I

REGsc3

≥200 mA

I

REG3

I

c. Regulator 3.

Fig.5 Foldback current protection of the regulators.

handbook, halfpage

≥3

I

sw

(A)

1.8

≥10

MGB758

REGm3

t (ms)

Fig.6 Current protection of the power switch.

1997 Aug 15 14

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

TEST AND APPLICATION INFORMATION
Test information

handbook, full pagewidth

V

ENSW

V

EN1

V

EN3

V

P

enable input power switch

supply voltage

C1

220 nF

enable input regulator 1

enable input regulator 3

1

11

10

4

power switch output

17

regulator 2
output

15

regulator 1
output

2

regulator 3
output

3

C2
220 nF

C3
10 µF

10 V

C4
10 µF

C5
10 µF

5 V

5 V

TDA3609JR

R

L(SW)

12 kΩ

R

L(REG2)

5 kΩ

R

L(REG1)

10 kΩ

R

L(REG3)

5 kΩ

V

V

IGN 2

V

bu

IGN1

R5

10 kΩ

R6

10 kΩ

C8

reset delay

C7
47 nF

C9
1 nF

C10
1 nF

capacitor

back-up

ignition 1

input

ignition 2

input

TDA3609JR

13

16

6

5

14

ground

9

12

7

8

reset
output

hold
output

ignition 1
output

ignition 2
output

MGK609

R2
10 kΩ

C6

1 µF
R3
10 kΩ

R4
10 kΩ

Fig.7 Test circuit.

1997 Aug 15 15

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

Application information

N

OISE

Table 1 Noise figures

REGULATOR NOISE FIGURE (µV)

CO=10µFCO=47µFCO= 100 µF

1 tbf 150 tbf
2 tbf 150 tbf
3 tbf 200 tbf

Note

1. Measured at a bandwidth of 200 kHz.

The noise on the supply line depends on the value of the
supply capacitor and is caused by a current noise (output
noise of the regulators is translated into a current noise by
means of the output capacitors). When a high frequency
capacitor of 220 nF in parallel with an electrolytic capacitor
of 100 µF is connected directly to pins 1 and 14 (supply
and ground) the noise is minimal.

S

TABILITY

The regulators are made stable with the external
connected output capacitors.

(1)

TDA3609JR

The output capacitors can be selected using the graphs of
Figs 8 and 9. When an electrolytic capacitor is used, the
temperature behaviour of this output capacitor can cause
oscillations at a low temperature. The next 2 examples
show how an output capacitor value is selected.

Example 1

Regulators 1 and 3 are made stable with an electrolytic
output capacitor of 220 µF (ESR = 0.15 Ω). At −30 °C the
capacitor value is decreased to 73 µF and the ESR is
increased to 1.1 Ω. The regulator will remain stable at

−30 °C.

Example 2

Regulator 2 is made stable with a 10 µF electrolytic
capacitor (ESR = 3 Ω). At −30 °C the capacitor value is
decreased to 3 µF and the ESR is increased to 23.1 Ω.
Using Fig.9, the regulator will be instable at −30 °C.

Solution

Use a tantalum capacitor of 10 µF or a larger electrolytic
capacitor. To avoid problems with stability at low
temperatures, the use of tantalum capacitors is
recommended.

C (µF)

MGK612

100

handbook, halfpage

R

(Ω)

20

15

10

maximum ESR

5

0

0.1

stable region

1

10

Fig.8 Curve for selecting the value of output

capacitor for regulators 1 and 3.

1997 Aug 15 16

handbook, halfpage

(Ω)

14

R

12
10

maximum ESR

8
6
4
2
0

0.22

stable region

minimum ESR

110

MGK613

C (µF)

Fig.9 Curve for selecting the value of output

capacitor for regulator 2.

100

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

PACKAGE OUTLINE

DBS17P: plastic DIL-bent-SIL (special bent) power package; 17 leads (lead length 12 mm)

non-concave

D

d

x

E

h

view B: mounting base side

A

D

h

2

TDA3609JR

SOT475-1

117

e

Z

DIMENSIONS (mm are the original dimensions)

UNIT A e

mm

A2bpcD

17.0

4.6

4.2

0.75

0.60

15.5

0.48

0.38

1

e

(1)

deD

24.0

20.0

23.6

19.6

w M

b

p

(1)

E

h

12.2

10 2.54

11.8

0 5 10 mm

B

j

L

3

1.27

scale

1

e

5.08

L

E

2

h

6

Q

LL3m

3.4

12.4

3.1

11.0

2.4

1.6

e

4.3

m

E

A

c

2

2.1

1.8

v M

(1)

v

Qj

0.8

0.4w0.03

Z

x

2.00

1.45

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

OUTLINE
VERSION

SOT475-1

IEC JEDEC EIAJ

REFERENCES

1997 Aug 15 17

EUROPEAN

PROJECTION

ISSUE DATE

97-05-20

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

SOLDERING
Introduction

There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.

This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our

“IC Package Databook”

Soldering by dipping or by wave

The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact

DEFINITIONS

(order code 9398 652 90011).

TDA3609JR

with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.

The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.

Repairing soldered joints

Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.

stg max

). If the

Data sheet status

Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.

Application information

Where application information is given, it is advisory and does not form part of the specification.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.

1997 Aug 15 18

Philips Semiconductors Preliminary specification

Multiple voltage regulator with switch and
ignition buffers

NOTES

TDA3609JR

1997 Aug 15 19

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Middle East: see Italy

Netherlands: Postbus 90050, 5600PB EINDHOVEN, Bldg. VB,

Tel. [phone], Fax. [phone]
New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND,

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Romania: see Italy
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Tel. [phone], Fax.[phone]
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252042 KIEV, Tel. [phone], Fax. [phone]

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United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. [phone]

Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,

Tel. [phone], Fax.[phone]

For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications,
Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax. [phone]

© Philips Electronics N.V. 1997 SCA55
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.

Internet: http://www.semiconductors.philips.com

Printed in The Netherlands 547027/1200/01/pp20 Date of release: 1997 Aug 15 Document order number: 9397 750 02248